How do I find a mentor?

Hello! I am a 20 year old from London who has been a part of this community since 2014. Over the past year as I have entered the world of business I have found a growing urge to find a mentor. Someone to speak to about work and career development going forward. In the tech space a lot of founders do have mentors so I wanted to ask how do you go about finding them? How do you know that this person is the right mentor for you? (PS: Feel free to get in touch if you want to speak about mentorship further)